Croon

1. (v. i.) To make a continuous hollow moan, as cattle do when in pain.

2. (v. i.) To hum or sing in a low tone; to murmur softly.

3. (v. t.) To sing in a low tone, as if to one's self; to hum.

4. (v. t.) To soothe by singing softly.

5. (n.) A low, continued moan; a murmur.

6. (n.) A low singing; a plain, artless melody.

Thesaurus Entries

anthem, ballad, carol, chant, chirp, chirrup, choir, chorus, descant, do-re-mi, hum, hymn, intonate, intone, lilt, minstrel, pipe, psalm, quaver, roulade, serenade, shake, sing, sing in chorus, sol-fa, solmizate, tremolo, trill, troll, tweedle, tweedledee, twit, twitter, vocalize, warble, whistle, yodel